[PSUBS-MAILIST] gel coat nightmare

[Michael Dell via Personal_Submersibles]

The cause of the wrinkling is the thin gel coat. If you think the gel coat
is marginal in terms of thickness you can better your chances of getting
away with it by applying a "hot" brew of resin when laminating... If you
leave the gel coat to cure too long you will still be able to laminate over
it the only problem is the long term adhesion and the possibility that
there may have been contamination to the cured surface, always better to
strip and do again....

Mike.

On Sun, 16 Dec 2018, 9:25 a.m. Brian Cox via Personal_Submersibles <
personal_submersibles at psubs.org wrote:

> Hi All,
>                  Fun and games with my gel coat project !   Thought I was
> doing everything right but apparently not.  After waxing my mold 4 times (
> 4 layers) then I applied the PVA mold release with a spray gun, that went
> well, so far so good.  Then time to spray the gel coat,  that went well
> also, though I probably did not spray a thick enough layer, but my big
> boner of a mistake was letting the gel coat sit too long, apparently I was
> suppose to apply the resin and fiberglass layers while the gel coat is
> still tacky otherwise the gel coat material changes chemically over time
> and crystallizes .  Anyway the result is a big gooey mess, luckily I was
> able to stop before getting too far along.  Instead of the gel coat
> adhering  to the fiberglass it started breaking down and melting into the
> resin and it got all crinkly.  So now I'm going to to wait and let what
> I've done set up so I can pull it off and start all over again !
>
> Brian
>
>
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